VCS: Prevent display of "Describe Change" for invalid revision
VCS: Prevent display of "Describe Change" for invalid revision

Change-Id: I0e0d3429819c4dc72071106c680e9db5d4f5cd32
Reviewed-by: Tobias Hunger <012f8d714267bccc9d4766fbeace9f175fcc70c4@nokia.com>

richardmg/qtcreator,kuba1/qtcreator,farseerri/git_code,richardmg/qtcreator,farseerri/git_code,duythanhphan/qt-creator,kuba1/qtcreator,omniacreator/qtcreator,omniacreator/qtcreator,malikcjm/qtcreator,malikcjm/qtcreator,amyvmiwei/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,amyvmiwei/qt-creator,duythanhphan/qt-creator,darksylinc/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,Distrotech/qtcreator,richardmg/qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,darksylinc/qt-creator,Distrotech/qtcreator,farseerri/git_code,malikcjm/qtcreator,darksylinc/qt-creator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,danimo/qt-creator,omniacreator/qtcreator,farseerri/git_code,malikcjm/qtcreator,omniacreator/qtcreator,syntheticpp/qt-creator,farseerri/git_code,danimo/qt-creator,xianian/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,kuba1/qtcreator,colede/qtcreator,syntheticpp/qt-creator,richardmg/qtcreator,colede/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,malikcjm/qtcreator,syntheticpp/qt-creator,richardmg/qtcreator,maui-packages/qt-creator,amyvmiwei/qt-creator,danimo/qt-creator,omniacreator/qtcreator,xianian/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,darksylinc/qt-creator,xianian/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,AltarBeastiful/qt-creator,omniacreator/qtcreator,omniacreator/qtcreator,martyone/sailfish-qtcreator,richardmg/qtcreator,duythanhphan/qt-creator,amyvmiwei/qt-creator,syntheticpp/qt-creator,darksylinc/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,farseerri/git_code,xianian/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,maui-packages/qt-creator,syntheticpp/qt-creator,Distrotech/qtcreator,xianian/qt-creator,syntheticpp/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,colede/qtcreator,colede/qtcreator,duythanhphan/qt-creator,Distrotech/qtcreator,richardmg/qtcreator,colede/qtcreator,danimo/qt-creator,malikcjm/qtcreator,darksylinc/qt-creator,martyone/sailfish-qtcreator,duythanhphan/qt-creator,malikcjm/qtcreator,danimo/qt-creator,maui-packages/qt-creator,colede/qtcreator,kuba1/qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,syntheticpp/qt-creator,maui-packages/qt-creator,colede/qtcreator,martyone/sailfish-qtcreator,farseerri/git_code,darksylinc/qt-creator,maui-packages/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator